275 results about "Total internal reflection" patented technology

An illumination apparatus is provided to correct for chromatic aberration. A light-emitting diode (LED) structure has multiple LED clusters and an optic associated with each cluster. Each cluster is disposed in a cavity in a different total internal reflectance (TIR) structure. Each cluster contains individual LEDs that are configured to emit light of a different color toward the optic. In each cluster: a center of at least one LED within the cluster is disposed at a different distance from a center of the cluster than a center of at least one other LED within the cluster dependent on a wavelength dependence of the optic. For each color, an average position of the LEDs configured to emit the color within the clusters and an average position of the LEDs configured to emit each other color within the clusters are identical.

This invention discloses a diffractive waveguide and its design method. The diffractive waveguide includes a waveguide substrate and a coupling-in region and a coupling-out region disposed on at least one side of the waveguide substrate. A beam of light projected from an image source is coupled into the waveguide substrate through the coupling-in region and transmitted to the coupling-out region by total internal reflection. The second coupling-out region of the coupling-out region includes multiple coupling-out sub-regions. At least two coupling-out sub-regions are filled with one-dimensional gratings with different grating directions to satisfy the requirement of pupil expansion and coupling-out of the beam through the second coupling-out region. The one-dimensional grating filled in the first coupling-out region of the coupling-out region has the same grating vector as one of the one-dimensional gratings in the coupling-out sub-regions to increase the coupling-out of edge rays and compensate for the coupling-out energy at the edges. Furthermore, the sum of the grating vectors of the one-dimensional gratings in the coupling-in region and the one-dimensional gratings in the coupling-out region is set to zero, so that the beam can be effectively coupled into the waveguide substrate and coupled out without dispersion, effectively improving the visual imaging effect of the diffractive waveguide.

This application discloses a method and system for synchronous testing of metasurface grating waveguide performance, relating to the field of metasurface grating technology. The method includes polarization state modulation and spatial frequency encoding of multi-wavelength incident beams to obtain a modulated incident light field; coupling this modulated incident light field into the metasurface grating waveguide under test, which then undergoes total internal reflection to form the outgoing light field; acquiring a raw dataset of the entire light field, including Stokes polarization images and spatial spectrum images corresponding to each wavelength of the outgoing beam; calculating the total internal reflection hop count based on the Stokes polarization image; calculating the spatial step size offset based on the spatial spectrum image; and establishing a mapping relationship between the image pixel coordinates of the raw dataset and the internal physical regions of the metasurface grating waveguide under test to obtain local diffraction efficiency distribution data. This application solves the problem that traditional outgoing end intensity testing is difficult to trace to local defects inside the waveguide, achieving synchronous, high-precision quantitative characterization of local diffraction efficiency across multiple wavelengths.

To provide a display device capable of switching an infinity mirror image to a non-display state, the display device comprises: a liquid crystal display (120); a semi-transmissive plate (150) arranged on the back side of the liquid crystal display; a total internal reflection mirror (140) arranged on one side opposite the liquid crystal display with respect to the semi-transmissive plate and positioned at a distance from the semi-transmissive plate; and a light source (160) having a central light emission axis directed toward the semi-transmissive plate or the total internal reflection mirror and emitting light into an area between the semi-transmissive plate and the total internal reflection mirror.

The invention provides an optical waveguide and a near-to-eye display device. The optical waveguide comprises a light guide part, a relay module arranged on the light guide part and a coupling-out module. Wherein the relay module is used for coupling light rays propagated by total internal reflection in the light guide piece to the coupling-out module; the light guide device further comprises an extinction device arranged on the light guide part, the extinction device at least comprises a first extinction device, and the first extinction device is used for absorbing one-dimensional emergent light transmitted by the relay module. Wherein the ratio of the refractive index of the first extinction device to the refractive index of the light guide part is within a set threshold value, and extinction particles are doped in the first extinction device. According to the technical scheme, the extinction device is arranged on the light guide part to eliminate the one-dimensional emergent light transmitted by the relay module, so that stray light in the light guide part is reduced, and the display effect of the near-to-eye display device is improved.

A multi-color LED illumination device and specifically a lens comprising a cylindrical opening extending into the lens from a light entry region at which one or more LEDs are configured. A concave spherical surface extends across the entirety of the light exit region of the lens, and a TIR outer surface shaped as a CPC extends between the light entry region and the light exit region. There are various diffusion surfaces placed on the sidewall surface of the cylindrical opening, as well as its upper planar surface and the exit surface of the lens. Lunes can also be configured on the sidewall surfaces of the cylindrical opening. The combination of lunes, diffusion elements, and the overall configuration of the lens provides improved color mixing and output brightness using three interactions in a first portion of light and two interactions in a second portion of light. Those interactions includes two refractions either with an intermediate reflection or not, all of which are necessary to achieve the improved performance of the multi-color LED illumination device and lens hereof.

The present invention relates to an emitter having at least one light source and a lens for shaping a beam for illuminating a target area. According to the invention, the lens has a through opening for allowing passage of an unreflected and undeflected direct light beam, on the input side of which the light source is positioned, wherein an inner circumferential surface enclosing said through opening at least partially forms a light entrance surface of the lens, at which some of the light rays emitted by the light source enter the lens, and are deflected by the lens by way of total internal reflection and are emitted as an indirect light beam from a light exit surface, wherein said inner circumferential surface is contoured in such a way that Fresnel reflections occurring at said inner circumferential surface are emitted through said through opening and illuminate the target area as part of the direct light beam and / or of the indirect light beam.

A touch sensing device is provided, comprising a top plate associated with multiple light sources and a base plate having one or more associated detectors for detecting light propagated within the base plate, wherein light from the multiple light sources propagates within the top plate by total internal reflection. The top plate and base plate are configured such that when an external object touches the first surface of the top plate, light is coupled from the second surface of the top plate to the base plate via the first surface of the base plate. The multiple light sources are arranged in linearly extending recesses within the second surface of the top plate, and light from the multiple light sources is coupled to the top plate via the walls of the recesses. The multiple light sources form a linear array within the linearly extending recesses.

Optical system (1) comprising a primary optical sensor (3) which is protected against environmental influences by an optically transparent protective cover (2), wherein the optical system (1) comprises a contamination detection system (4), wherein the contamination detection system (4) comprises at least one optical transmitting unit (5, 6) and at least one optical receiving unit (7, 8), wherein a first transmitting unit (5) is configured to couple a first light signal into the protective cover (2) in such a way that the first light signal propagates in a directed manner with at least one total internal reflection within the protective cover (2) on a first propagation path (9), wherein a first receiver unit (7) is configured to couple out and receive the first light signal from the protective cover (2) at one end of the first propagation path (9), wherein the contamination detection system (4) is configured to detect contamination (11) on a surface of the protective cover (2) along the first propagation path (9) by comparing the first light signal received by the first receiver unit (7) with an expected first light signal, wherein the optical system (1) is configured such that by rotating and / or shifting the contamination detection system (4) the first propagation path (9) within the protective cover (2) is shifted and / or rotated so that the contamination detection system (4) detects contamination (11) along the surface of the protective cover (2) swept by the first propagation path (9); characterized by the fact that the contamination detection system (4) comprises a second optical transmitting unit (6) and a second optical receiving unit (8) which, according to the first propagation path (9), form a second propagation path (10) through the protective cover (2) by means of a second light signal, wherein the second propagation path (10) differs from the first propagation path (9).

The invention discloses AR glasses, which comprise a glasses frame, an optical machine and a waveguide, and is characterized in that the optical machine is used for outputting image light; the waveguide is installed on the mirror frame, a coupling-in area and a coupling-out area are arranged on the waveguide, and the image light is coupled into the waveguide through the coupling-in area, is totally reflected in the waveguide, is transmitted to the coupling-out area and is coupled out through the coupling-out area; wherein the light machine is arranged on one side, close to the nose bridge, of the glasses frame, and is configured to project the image light to the coupling-in area; compared with the prior art, the scheme can optimize the optical machine layout and improve the structural reliability.

This invention provides a high-refractive-index adhesive layer for photovoltaic cells, its preparation method, and its application. The raw materials for this high-refractive-index adhesive layer include at least one polymerizable monomer and at least one fluorescent agent. The refractive index of the high-refractive-index adhesive layer is 1.50~1.67, and the center wavelength of the emitted light is greater than the center wavelength of the absorbed light; furthermore, the difference between the center wavelengths of the emitted and absorbed light is ≥60 nm. By controlling the refractive index of the high-refractive-index adhesive layer, this invention can effectively enhance the light-harvesting efficiency of photovoltaic cells. Furthermore, the portion of fluorescence emitted by the fluorescent agent in the adhesive layer that escapes will be re-entered into the cell due to total internal reflection between the adhesive layer and the first encapsulation film layer, thereby improving the utilization rate of fluorescence.

To provide a workpiece detection device capable of detecting translucent workpieces with a relatively simple configuration. [Solution] The detection device A10 comprises a reference surface 311, a reference axis N, a light-emitting unit 411, and a light-receiving unit 511. The light-emitting unit 411 and the light-receiving unit 511 are located on opposite sides of each other with the reference surface 311 in between, and are also located on opposite sides of each other with the reference axis N in between in a virtual cross-section S that includes the reference axis N in its plane. When a translucent workpiece 80 is on the reference surface 311, the light emitted from the light-emitting unit 411 enters from a first region 831 of the end face 83 of the workpiece 80, undergoes total internal reflection at the interface between the workpiece 80 and the outside air, and then exits from a second region 832 of the end face 83 of the workpiece 80 without reaching the light-receiving unit 511. When the workpiece 80 is not on the reference surface 311, the light emitted from the light-emitting unit 411 reaches the light-receiving unit 511.

An edge-lit waveguide illumination system with a thin, flexible layer of optically transmissive material designed for guiding light through optical transmission and total internal reflection. The system features a randomized two-dimensional pattern of discrete cavities formed on its back surface, and an array of linear cylindrical lenses on its front surface. Light is emitted by a plurality of LEDs positioned along a light input edge. A sheet of reflective material is positioned coextensively on the back surface. At least one cavity features a curved wall with a specific angle. Additional components may include a photoresponsive layer, a heat-dissipating metallic substrate with side-emitting LEDs, and optical adhesives or encapsulants. The system may also incorporate luminescent centers and / or a light-diffusing layer for altering light characteristics.

This invention relates to a high numerical aperture, large field-of-view total internal reflection microscope objective in the ultraviolet wide band. Along the optical axis from image to object, it comprises: a first objective consisting of a first and a second reflecting mirror arranged sequentially along the optical axis OA from image to object, used to receive parallel light and form an intermediate image plane; and a second objective consisting of a third and a fourth reflecting mirror arranged sequentially along the optical axis OA from image to object, used to image the intermediate image plane onto the object plane. The first reflecting mirror is a convex mirror with negative optical power; the second reflecting mirror is a concave mirror with positive optical power; the third reflecting mirror is a concave mirror with positive optical power; and the fourth reflecting mirror is a concave mirror with positive optical power. This invention employs a four-mirror total internal reflection structure, and by optimizing the focal length and aperture ratios of each reflecting mirror, it achieves a balance between high numerical aperture and a large field of view, overcoming the limitations of traditional total internal reflection objectives where numerical aperture and field of view are mutually constrained.

An illumination module and illumination systems incorporating such modules are provided. The illumination systems include a housing body that secures one or more arrays of illumination modules, with each array of illumination modules comprising one or more individual illumination modules. Specifically, each illumination module can include: a retaining cup having a first end, a second end, and a sidewall extending from the first end to the second end, where the second end of the retaining cup defines an exit aperture of the illumination module; a light source disposed on a portion of a first surface of a light source board, wherein the portion of the first surface of the light source board covers the first end of the retaining cup; and a total internal reflection (TIR) optical device having an optical film, the TIR optical device being disposed within the retaining cup and abutting the light source.

A display device is provided that is set up to display an infinity mirror image.A display device (200) comprises a liquid crystal display section (220); a semi-transmissive plate (250) arranged on the back side of the liquid crystal display section; a total internal reflection mirror (240) arranged opposite the liquid crystal display section above the semi-transmissive plate and facing the semi-transmissive plate with a distance between the total internal reflection mirror and the semi-transmissive plate; a first light source (260) having a central light emission axis directed towards the semi-transmissive plate or the total internal reflection mirror and configured to emit light into an area between the semi-transmissive plate and the total internal reflection mirror; and a perimeter backlight (280) comprising a second light source (282) and a light guide (281) configured to guide the light emitted by the second light source.The edge-side backlight (280) is positioned closer to the total internal reflection mirror than to the first light source.

A total internal reflection (TIR) optic having a body, fins, and a resilient member. The body includes a truncated, conical first end having a first circumference and a truncated, conical second end have a second circumference. The first circumference is greater than the second circumference. The fins of the TIR optic extend radially from the first end of the body. The resilient member of the TIR optic extends circumferentially from a fin, the resilient member having a secured end at the fin and a free end opposite the secured end. The free end of the resilient member is configured to be moved between first and second positions that are different. When in the first position, the free end is offset from the first circumference of the first end. A luminaire having the TIR optic and methods of mounting the optic in a luminaire.

To provide favorable air pocket structures for promoting total internal reflection in a waveguide.SOLUTION: Recesses are formed on a front side and a rear side of a waveguide. A solid porogen material is spun onto the front side and the rear side and fills the recesses. First front and rear cap layers are then formed on raised formations of the waveguide and on the solid porogen material. The entire structure is then heated and the solid porogen material decomposes into a porogen gas. The first front and rear cap layers are porous to allow the porogen gas to escape and to allow air to enter into the recesses. The air maximizes a difference in refractive indices between a high-index transparent material of the waveguide and the air to promote reflection in the waveguide from interfaces between the waveguide and the air.SELECTED DRAWING: Figure 5

The present disclosure relates to light redirecting elements in solar energy absorption systems and envisages a light redirecting prism, a redirecting prismatic wall and a solar panel incorporating the same. The light redirecting prism has three elongate surfaces. The incident surface receives incident parallel rays of light. The redirecting surface performs total internal reflection of the light travelling from the incident surface through a predetermined range of angles and thus redirect the light. The transmitting surface transmits the redirected light at a predetermined angle out of the prism and directs the light towards a solar energy absorbing device. Further, a redirecting prismatic wall can be constructed to comprise redirecting prisms. The light redirecting prism or redirecting prismatic wall can be used in solar panels for enhancing quantum of light incident on the PV cell of the panel.

The invention discloses a surface plasma-based reverse Cherenkov medium laser accelerator, which is characterized in that a silicon medium prism, a first silver metal film, a first silicon medium film, a high-vacuum particle channel, a second silicon medium film, a second silver metal film and a silicon medium substrate are sequentially arranged from top to bottom to form a seven-layer metal-medium alternating structure; single-side incident laser excites surface plasma to realize particle acceleration. Incident electromagnetic waves are subjected to total internal reflection at the bevel edge of the prism, evanescent waves are generated, the longitudinal wave vector component of the evanescent waves meets the excitation condition of SPPs at the medium-metal layer interface, then the SPPs are excited on the metal-medium interface, and a remarkably enhanced near field is generated. The enhanced electric field forms longitudinal accelerating fields which are symmetrically distributed in the high-vacuum particle channel, and energy gain is continuously provided for electrons; meanwhile, the transverse electric field component is minimized in the central area of the channel due to mutual offset of upper and lower components, so that particle deflection is effectively inhibited.

This invention discloses a lens and a wall washer light. The optical axis of the lens is parallel to the optical axis of the light source. The lens has a mounting surface for installation, and a light source groove for placing the light source is formed on the mounting surface. The peripheral wall and bottom surface of the light source groove form the incident surface of the lens. The lens is characterized by having an irregularly shaped structure located at the far end of the direction of light emission. This irregularly shaped structure has an exit surface for light to exit. The irregularly shaped structure is configured to allow light entering through the incident surface to undergo total internal reflection and direct reflection before exiting through the exit surface. By designing a lens with an irregularly shaped structure, this invention allows light initially directed away from the wall to undergo total internal reflection before exiting through the exit surface, along with light directly impacting the exit surface, and then directed towards the far end of the wall. This achieves convergence of light with a large incident angle, resulting in more light exiting the first exit surface and greater illumination brightness. This achieves uniform illumination of the wall surface by the emitted light, relying solely on its own structure without depending on a lampshade.

The application discloses a liquid refractive index sensing system and method based on an optical waveguide structure and weak measurement. The application comprises an SLD light source, a Gaussian filter, a polarizer I, a polarizer II, an optical waveguide, a quarter-wave plate I, a quarter-wave plate II and a spectrometer. The SLD light source emits laser with a center wavelength of 830 nm, and the laser is pre-selected by the front selection polarizer after passing through the Gaussian filter. The light is emitted after multiple total internal reflections on the surface of the waveguide of the liquid to be measured, the phase of the p and s polarizations of the emitted light is adjusted by the wave plate, the light is post-selected by the post-selection polarizer, the emitted light is received by the spectrometer and the center wavelength is analyzed, and finally the refractive index of the liquid to be measured is calculated according to the center wavelength displacement by the computer. The application also provides a liquid refractive index sensing method based on an optical waveguide structure and weak measurement. The application realizes straight-line common path and multiple reflections through the optical waveguide, and has higher stability and sensitivity than traditional measurement methods.

A lens module includes an optical prism. The optical prism includes a prism body and at least one recess structure. The prism body includes a first surface, a second surface, a third surface and a fourth surface, wherein the first surface and the third surface are opposite, the second surface and the fourth surface are opposite, the first surface is adjacent to the second surface and the fourth surface, and the third surface is adjacent to the second surface and the fourth surface. A light beam enters the prism body through the first surface, undergoes multiple total internal reflections in the prism body, and leaves the prism body through the fourth surface. The recess structure is formed on the prism body, and extended from the surfaces of the prism body to the interior.

The invention belongs to the field of polarization optics and instruments, and discloses an infrared phase aberration eliminating phase retarder. The phase retarder is formed by attaching two rhombic prisms made of infrared optical materials, and one or more reflecting surfaces of the phase retarder are coated with metal reflecting films. Incident light beams are reflected for four times in the prism and then are emitted, and a specific amount of phase difference is introduced between a p component and an s component of light waves through total internal reflection and metal film reflection. The phase delayer can be designed to be used for near-infrared, medium-wave and long-wave infrared bands, has a certain phase aberration eliminating capability in the designed bands, can realize phase delay of 90 degrees, 180 degrees or other specific values, is parallel to an emergent light beam and an incident light beam, has no transverse movement of the light beam under the normal incidence condition, and is also easy to process and manufacture. The achromatic phase retarder can be used in various infrared polarization optical systems and is used for realizing conversion of infrared light wave polarization states.

A total inner reflection (TIR) prism comprises two essentially triangular prisms separated by an optical coating or by a thin layer of air, wherein one of said two triangular prisms is shaped as an isosceles triangle.

The utility model relates to an optical lens, in particular to a splicable lens, which is used for solving the problems of high mold cost, easiness in damage and poor flexibility in manufacturing of a long arc-shaped light band. The lens comprises an arc-shaped bent lens body (10), a light inlet face (11) is arranged at the bottom of the lens body to receive light of a light source, a reflecting face (12) is arranged on an inclined face to reflect the light to the side face, and a light outlet face (13) is arranged on the side face to output the light. The first end side face (14) and the second end side face (15) at the two ends of the lens body are matched in shape and can be directly spliced end to end. In a preferable scheme, a splicing piece (20) is additionally arranged, the two splicing side faces (21) of the splicing piece (20) are matched with the end side faces (14 and 15) in shape, and the splicing piece (20) is matched with different splicing radians through included angle design. Light vertically enters through the light inlet face (11), is totally internally reflected by the reflecting face (12) and then vertically exits from the light outlet face (13), and 90-degree steering is achieved. Through the modular splicing design, the die cost and the production risk are remarkably reduced, and the length and the curvature of the light band are flexibly adjusted.

This invention relates to a double-sided, highly uniform light guide plate with side scattering, a processing method, and a backlight plate. The light guide plate includes a first end, a second end, a center position, a first side, a second side, a first scattering structure, and a second scattering structure. The first scattering structure is disposed on the first side and includes multiple scattering holes. The aperture, depth, and density of the scattering holes gradually increase in the direction from the first end toward the center position and from the second end toward the center position. The maximum thickness of the light guide plate is denoted as D, the maximum depth of the scattering holes is denoted as H1, and the minimum depth of the scattering holes is denoted as H2. H1 and H2 are both within the range of [1 / 10D, 1 / 4D]. The aperture change, depth change, and spacing change of adjacent scattering holes are K1, K2, and K3, respectively, wherein the values ​​of K1, K2, and K3 decrease sequentially. The second side has a first inclined surface to gradually reduce the thickness of the light guide plate. By combining the scattering holes and the first inclined surface, total internal reflection is disrupted, resulting in a more uniform light output from the light guide plate.

The system, method, and apparatus includes a platform having a transparent material defining a first measurement surface. A light surface is disposed to provide light into the transparent material and generate a frustrated total internal reflection (FTIR) event in response to contact at the first measurement surface. The system also includes one or more wearable devices having a base material operable to cover a portion of a human body. An inner surface of the base material defines a second measurement surface. Further, one or more sensors disposed on the base material are operable to collect data at the second measurement surface. Further, the health parameter monitoring system presents displacement motion regimen information on a display screen, such as a virtual reality (VR) headset. The system collects first health parameter data from the first measurement surface based on the FTIR event; and / or collects second health parameter data from the second measurement surface.

The invention discloses an optical waveguide structure composite material based on SAN resin and a preparation method thereof. The raw material composition is as follows: 60-70 parts of SAN resin; 30 to 40 parts of PMMA (polymethyl methacrylate) resin; 0.1 to 1 part of modified nano CeO2; 1 to 5 parts of a maleic anhydride grafted SEBS compatilizer; and 0.1 to 1 part of an antioxidant. According to the material, through a double-effect anti-reflection mechanism of a synergistic effect, the light transmittance gt of a key ultraviolet band is remarkably improved; on one hand, the refractive index difference between the PMMA fibers which are continuously distributed in the axial direction and the SAN matrix is utilized to guide ultraviolet light to generate total internal reflection conduction at an interface, and the inherent strong ultraviolet absorption characteristic of the SAN matrix is effectively avoided; on the other hand, by means of the Rayleigh scattering effect generated by the CeO2 nanoparticles which are subjected to double surface modification and are uniformly dispersed, the transmission efficiency of ultraviolet light is selectively enhanced. According to the preparation method, a slit die head is adopted for extrusion preforming, and key processes of longitudinal hot stretching (inducing PMMA fibrosis) and water bath shock cooling (locking an optical waveguide microstructure) are combined, so that precise construction and large-scale preparation of an optical waveguide structure in the material are realized. The prepared composite material has high ultraviolet light transmittance, excellent mechanical properties and good chemical resistance, and has wide application prospects in the fields of micro-fluidic chips, electrophoresis plates, medical instruments and optoelectronic devices.

The invention relates to a polycapillary optical unit, in particular for X-ray radiation, consisting of a bundle of capillaries (32), with the capillaries (32) each having a length which is a multiple of a diameter of the capillary (32), having an entry side (34) for a radiation to be coupled in from a radiation source, having an exit side (36) which is opposite the entry side (34), from where the input-coupled radiation arrives at the exit side (36) by way of total-internal reflection off the respective inner wall, and which is where said input-coupled radiation exits, wherein the capillaries (32) are curved toward the exit side (36) such that the exiting radiation is focused on a focus (37) at a focal length (f2), wherein the at least one capillary (32) has a capillary portion (38) oriented toward the exit side (36), the inner wall (31) of the at least one capillary (32) having a surface (33) that prevents total-internal reflection at least in sections along said capillary portion.